DetectiveOS is a browser-based murder mystery game where players step into the role of a real detective — investigating cold cases, hacking terminals, analyzing forensic evidence, interrogating suspects, and issuing indictments. No downloads required. It features immersive tools like IP tracing, steganography analysis, email interception, and encrypted file recovery across cinematic cases (locked-room hotel murders, train mysteries, disappearances). Players purchase "Clearance" tiers to unlock restricted cases and features.